It's supposedly excellent based on commentary from those who've played it. But the NieR series, and Yoko Taro's games in general, are something of an acquired taste. Example: he's very Kojima-like in that he makes games that are aware that they're games, so be prepared for some self-referencing. Additionally, he makes games that are meant to be replayed multiple times. NieR was meant to be played 3 times (and thankfully, the replays dropped you in halfway so you didn't have to go through the story build-up again). NieR: Automata is meant to be played 4 times, with the first 2 playthroughs basically serving as a prequel for the brand new content in the last 2 playthroughs.